1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
quester [9]
3 years ago
13

Solve by completing the square x^2-6x-16=0

Mathematics
2 answers:
Greeley [361]3 years ago
7 0

Answer:

x = 8 or

x = -2

Step-by-step explanation:

<h2><em>Completing The Square</em><em>:</em></h2>

x² - 6x - 16 = 0

Here,

a = 1

b = -6

c = -16

Now,

x² - 6x + [6/2(1)]² - [6/2(1)]² - 16 = 0

x² - 6x + (6/2)² - (6/2)² - 16 = 0

x² - 6x + (3)² - (3)² - 16 = 0

(x - 3)² - 9 - 16 = 0

(x - 3)² - 25 = 0

(x - 3)² = 25

x - 3 = +-√25

x - 3 = +- 5

x = 3 +- 5

x = 3 + 5 or x = 3 - 5

<em><u>x = 8 or x = -2</u></em>

Hope it's helpful

Elan Coil [88]3 years ago
3 0

Answer:

Step-by-step explanation:

You might be interested in
Without using a calculator, choose the statement that best describes the value of
castortr0y [4]

Answer:

8

Step-by-step explanation:

i would say in between 8&9 bc the square root of 8 is 36 and 9 is 81 and that's right in the middle

4 0
2 years ago
Read 2 more answers
Could someone please help me with this​
kicyunya [14]

Answer: i think it would be D

Step-by-step explanation:

7 0
2 years ago
1/8 + 3/16 1/8 + 3/16 equals
makvit [3.9K]
What you have to do here is to find a common denominator.
In this case, both 8 and 16 are multiples of 16.
therefore, you've got to multiply the first equation by 2.
1/8*2= 2/16
You've then got to add these together because you've got the same denominator.
2/16+ 3/16= 5/16 (as you don't add the denominators)
If you've meant to put the answer twice in the question, then you've simply got to double it.
Hope this helps :) 
7 0
3 years ago
Read 2 more answers
Juan must purchase car insurance. He needs to earn at least $50.00 a week to cover the payments.
jeka57 [31]

Answer:

Step-by-step explanation:

3 0
2 years ago
4y square + y - 45 when y=-5
kobusy [5.1K]

Given:

The expression is

4y^2+y-45

To find:

The value of the given expression when y=-5.

Solution:

We have,

4y^2+y-45

Putting y=-5, we get

4(-5)^2+(-5)-45

=4(25)-5-45

=100-50

=50

Therefore, the value of the given expression is 50 when y=-5.

7 0
3 years ago
Other questions:
  • There are 1,525 pages in a book. Julia and Kim round the number of pages to the nearest hundred
    7·2 answers
  • Ben drove 350 miles in 6 1/2 hours Marcie drove 520 miles on 12 1/4 hours who drove faster
    15·1 answer
  • Break 42 into 7 equal fractions
    15·2 answers
  • 4. Square ABCD is shown. What is the length of diagonal AC? Round to the nearest tenth, if necessary.
    14·1 answer
  • I have two fair dice both numbered 1 to 6. I throw both dice and add both numbers together. What is the probability that the num
    9·1 answer
  • A meal at a restaurant cost $ 22 and the sale tax of $ 1.87 was added to the bill. what is sale tax in this city?​
    8·1 answer
  • May someone solve and give explanation
    12·1 answer
  • Show work please thanks
    9·1 answer
  • Solve for x. Enter the solutions from least to greatest. Round to two deical places. (x+8)^2-2=0
    5·1 answer
  • Which pair of triangles can be proven congruent by ASA?
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!